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Onerous has 63 synonyms. The top synonyms for onerous are grievous, operose, toilsome, impeditive, burdensome, burdensomely, grueling, strenuous and 55 more. Another word for onerous is grievous. Browse the full list below.
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Frequently asked questions
What is a synonym for onerous?
A common synonym for onerous is grievous. Other synonyms include operose, toilsome, impeditive, burdensome.
How many synonyms does onerous have?
Onerous has 63 synonyms listed on Thesaurasize.
What does onerous mean?
(adj): burdensome; difficult; wearing; tiring
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